Hello

Starting to create a small application in processing which uses video and this is the first time I really need to start splitting things into classes, the first I need being a webcam capture class.  Here is the main sketch invoking the class:

Webcam_capture v_camimage;

void setup()
{
 size(640, 480, P3D);
 background(255);
 v_camimage = new Webcam_capture();
}


and here is the class:

class Webcam_capture
{
   import processing.video.*;
   PApplet p;
   Capture v_capture;
   PImage v_image;
   int v_width, v_height, v_xpos, v_ypos;
 
 Webcam_capture()
 {
   //dv video name
   String webcam = "IIDC FireWire Video";
   
   //width and height stored as a variable
   v_width = 318;
   v_height = 256;

   //capture the camera
   v_capture = new Capture(p, webcam, v_width, v_height);
   v_capture.framerate(30);
   
   //calculate position for video on screen according to window size and video size
   v_xpos = (width / 2) - (v_width / 2);
   v_ypos = (height / 2) - (v_height / 2);
 }

 //capture event function
 void captureEvent(Capture v_capture)
 {
   //read the latest image from the capture event
   v_capture.read();
 }

 //draw function (this loops - like an exitframe in director)
 void draw()
 {
   //set the image to be the latest image from capture event
   v_image = image(v_capture, v_xpos, v_ypos);
   return v_image;
 }

}

I seem to be mainly getting a problem with the line:
v_capture = new Capture(p, webcam, v_width, v_height);
in my original webcam capture sketch I have this where p is, here I've copied it from an example I found online but I expect there are several issues, can anyone point me in the right direction?

a+
gar

You need to pass the papplet into your class:

Code:

 void setup()
{
  size(640, 480, P3D);
  background(255);
  v_camimage = new Webcam_capture(this);
}
 
 
and here is the class:
 
class Webcam_capture
{
    import processing.video.*;  
    PApplet p;  
    Capture v_capture;  
    PImage v_image;
    int v_width, v_height, v_xpos, v_ypos;
   
  Webcam_capture(PApplet parent)
  {
    //dv video name
    String webcam = "IIDC FireWire Video";  
    p=parent;
    //width and height stored as a variable
    v_width = 318;
    v_height = 256;
 
    //capture the camera
    v_capture = new Capture(p, webcam, v_width, v_height);  
    v_capture.framerate(30);  
     
    //calculate position for video on screen according to window size and video size
    v_xpos = (width / 2) - (v_width / 2);
    v_ypos = (height / 2) - (v_height / 2);
  }
 
  //capture event function
  void captureEvent(Capture v_capture)
  {  
    //read the latest image from the capture event
    v_capture.read();  
  }  
 
  //draw function (this loops - like an exitframe in director)
  void draw()
  {
    //set the image to be the latest image from capture event
    v_image = image(v_capture, v_xpos, v_ypos);
    return v_image;
  }  
 
}